{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"8d78acaabbb667b3f13d6efd855deef35a6f5b703ae804629a603e0b3aab8666","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["b43105c9fb25102100752bcf78ff028519c9553b67033906439b2ab63dd8276d","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"67dbc8396e579bb5c7d5f732ddc7f0211846a6879d0fde9150337001550b3fab","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"cm.ultrafast-spintronics.spin-seebeck-origin","kind":"phenomenon","literature_status":"open","n":"2","parents":[],"plain":"A temperature difference across a magnetic insulator like yttrium iron garnet drives a spin current into an attached platinum strip, where it appears as a voltage. Which spin waves carry this current, and how lattice vibrations help, is not settled.","posed_since":"2008","precise":"In YIG/Pt the longitudinal spin Seebeck voltage depends on YIG thickness (saturating over lengths of order $10^{-4}$ cm), magnetic field (suppressed at high field), and temperature, with anomalies where magnons and phonons hybridize (magnon polarons, 2016). Determine the roles of bulk thermal-magnon accumulation, the interfacial magnon-electron temperature difference, and magnon-phonon coupling, and predict the voltage versus thickness, T and field. An answer is one quantitative model reproducing all three dependences.","problem_ref":"b43105c9fb25102100752bcf78ff028519c9553b67033906439b2ab63dd8276d","references":"","settled_by":"A parameter-free model using measured magnon and phonon spectra that reproduces the thickness, field and temperature dependence of the voltage in YIG/Pt.","status_note":"Bulk magnon accumulation models describe the thickness dependence and magnon-polaron anomalies show phonons matter; a unified quantitative account is lacking.","title":"Microscopic origin of the spin Seebeck effect","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"23caca2f85859ca3adca795cbc6a4798a060e1030763c7308f6ce500838dfb0b","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"5a59df1ec418d0e2eefdc9f90e31e08af3c193540c785dd5cc1f59a1c81a961a","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"j6aShnPjH-uSvzXln6-OP4gJK42VzZ8LBrkOKaa5JjLmZiHmDvj1ReGr93bRICuAIpBBc1wHRylkw6KNEdBUBQ"},"schema":"pubphys.envelope/1"},"record_hash":"23caca2f85859ca3adca795cbc6a4798a060e1030763c7308f6ce500838dfb0b","leaf_index":3096}